Q: What are the prime factors of the number 872,800?

 A: 2, 5, 1091

Why are those the prime factors of the number 872,800?

Prime factors are the prime numbers that can be multipled together to equal the original number. You find the factors by dividing by prime numbers. It is best shown by creating a Factor Tree.

Factor Tree for the number 872,800

872,800
Factor Arrows
2436,400
Factor Arrows
2218,200
Factor Arrows
2109,100
Factor Arrows
254,550
Factor Arrows
227,275
Factor Arrows
55,455
Factor Arrows
51,091

The numbers in bold above are the prime factors. If there are multiples, you only count them one time. This leads us to our prime factors of:

2, 5, 1091

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 5 x 1,091 = 872,800

This can also be written as 25 x 52 x 1,0911 = 872,800

If you would like to know more, or need additional explanation, please review our prime factorization explanation.


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